Testing apparatus



Oct. 28, 1941. s. P. BROWN TESTING APPARATUS 2 Sheets-Sheet l Filed Sept.

/d/yf FIFTH THIRD SECOND FIRST FOURTH ATTORNEY @Jig i Oct. 28, 1941. s. P. BROWN TESTING APPARATUS Filed Sept. 14, 1940 2 Sheets-Sheet 2 INVENTOR `Samue/ P B rown ATTORNEY Patented Oct. 28, 1941 TESTING APPARATUS Samuel P. Brown, Maplewood, N.-J., assignor to Delehanty Institute, Inc., New York, N. Y., a corporation of New York Application September 14, 1940, Serial No. 356,737

20 Claims.

This invention relates to testing apparatus for determining the times of a persons response or reaction to given stimuli. Such reaction testers are used to quantitatively determine a persons adaptability for certain kinds of work or activity,

for example, operating an airplane, a motor car or other vehicle or machine. The invention is described with reference to the testing of a persons adaptability for operating a motor car, by testing his time of response or reaction to the flashing of certain lights which indicate that pre-determined acts are required to be performed. But it is clear that the invention may be applied to test adaptability for other types of vehicles or for other or anykind of work or activity, and that stimuli other than the flashing of lights and other called-for acts, may be employed.

One of the objects of the invention is to devise a quantitative testing machine of the class described. A further object of. the invention is to devise a machine which shall be sturdy'to withstand'the rough usage such machines receive and which shall be fool-proof and steady in its operation. For the attainmentof these and such oth er objects as shall hereinafter appear or be pointed out I have shown in the accompanying drawings one embodiment of my invention, wherein:

Fig. 1 is a diagrammatic view, in perspective,

of the stimuli signal lamps and the various controls, in the cab of a motor vehicle, which are to be operated in response to the flashing "of the stimuli signals;

g Fig. 2` is the main electricalV circuit diagram;

Fig. 3 is the electrical circuit diagram showing the operation of the signal sequence switches;

Fig. 4 is a detail showing'two 'of the ksteps cams; i r

Fig. 5 is a time vschedule of operation of certain parts of the machine; and

Fig. 6 is a schedule of signal sequences.

The invention will be describedr in connection with the testing of the time of response to the flashing of light signals, each of which'call for a certain operation in the driving of an automobile, such as the turning of the steering wheel to the left or to the right, the pulling of a hand brake and the stepping on a left or right footlever. rIhe person undergoing the test sits in the drivers seat of a dummy vehicle, with his hands on steering wheel I, Figi, andvwith hisfeet on the iloor of the cab near left foot lever' 2L and right foot lever 2R; to his left is the hand brake 3. Several feet in front of the cab and more or less at the level of the drivers eyes is a signal lightbox I0 which contains ve'vpairs of lights, each pair `of lights comprisinga greenli'ght (upaper) 'and va red lightv (lower). Thesesignals are,

readinglfrom the'left in Fig. 1, the left turn green signal IlLzand red signal 2|L,the1right turn green signal IIR and red signal ZIR, the left foot green signal I2L and red signal 22L,

`the..fright foot green signal |2R and` red signal 22R, and thel hand brake green signal I3 and red signal 23. The acts called for, e. g.fLeft turn, Right turn, etc. are displayed in large letters 8 so that they may be readily seen by the driver in the cab. i

An electric clock, designated generally 30Qin Fig. 2, is Vplaced in front of the cab and to one sidethereof so that it maybe seen by both the person undergoing the test in the' cab and by the person conducting the test. The clock hand 3|, which registers seconds and tenths of a second on the dial, is driven from its synchronous'motor 32 through a clutch 33.

The'clock motor is normally idle and theclock .clutch is normally in disengaged condition'.

Both the green and the red lights of the signal box I0 are normally dark. Both the' signals. 'and theA clock are caused ,to function 'upon the closing of a starting hand switch 4l. This switch is constantly urged by a spring. to open condition (as shown in Fig. 2) and is held down for two or three seconds by the person' conducting the test, to inaugurate a test cycle.

The first effect of holding starting switch 4t closedfor a few seconds is to energize starting relay 42, which has three armature contacts 43, 44 and 45 which, when the relay is-un-energized `(as shown in Fig. 2) makes with rear contacts 53 and .55. Energizationof the relay causes its armature to move to the left (as viewed in Fig. 2)' to break with the rear contacts and make with the front contacts 53, 54 and 55. The circuit to the relay is readily traced from supply .,'lineMLv through starting switch 4|, through the relay, to ground at the relay. The rst `eiect of energizing the starting relay is to cause rotation ofa control moto-r .50. The circuit to this motor may be traced from supply line 40 to front contact 54, relay contact 44, motor lead 51, through the armature of the motor, motor lead 56, relay contact 43, front contact 53, and to ground. The eld circuit to the'v motor may be traced from supply line 4U to front contact 55, relay contact 45, motor lead 58, motor eld,'motor lead 56, relay contact 43, front contact 53, and to ground.

The motor is a wound rotor induction motor vergized at this' time.

having a builtin eiectrie'brake which instantly stops the motor when direct current is passed through its eld. A rectier 46 supplies D. C.y

Vcurrent to the rear contacts 55 and 53.4 ofthe relay, so that upon the de-energization of the relay and the rightward (in Fig. 2) return of its armature, a D. C. lcurrent is passed to the motor -field, the circuit of vwhich may be traced from rear contact 55', relay contact 45, motor lead` 58, field of motor, motor lead 56, relay contact 43,

I rear contact 53', and back to rectier 45.

Control motor 50 makes a single revolution to number of control cams. The rst thing that happens upon the start of revolution .of the cam'- shaft is to establish a holding circuitV4 to the re-l lay lI2-` For this purpose there is provided on-the Vcamshaft a holding cam 6i) which has a'raised protuberance 60a coacting with a switch 41.r

'Ihis switch is in a circuit to the starting relay 42, which circuit'may be traced from supply linei40', 4switch '41, relayv 42, and to ground. In th'ejnor- -mal restcondition of the camshaft (as-.shown in 'Fi'g."2) protuberance' 60a vof holding cam 60 keeps lighted. The current to these rive green lamps Vand to the've-red ones 2IL, 2IR, 22L, 22R and-23,

is under control Aof five relays .'I'I`,`I I", 12, I2 and 'I3.'- rThe circuit to the green lamps, say to IILj, may be traced from supply line 40, through start- Y -ingswitchA 4I (and, later, through holding switch 41)',to lower contact b' of lamp relay 1 I, through relay'con'tact B, upper contact b, throughlamp '.IIL. andto ground. The circuits to the' yother .green lamps may be tracedv in a similar manner. It.` is to' be noted that the lamp relays arel'un-en- The turning on 'of the live 'green lights' yirulication .that the test is underway. rThe test comprises' a lighting of the red lamps (with a concurrent extinguishing Vof" the.' corresponding gree'nlamps) one after the other. ForV example,

the first red signal to -be lgiven might be `red Alamp 2IL, Vsee Fig. .1, concurrently therewith' green'lam'p IIL is extinguished. This pair Yof lamps require the driver to `make alfleft turn,

Thev

1i. e., to turn steering wheel I to theleft. red signal remains lightedfor a pre-determined period unless sooner extinguished by the driver .performing the called-for act.. Thelightingof :the-red lamps (and the concurrent extinguishing of .the corresponding'green lamps) is under con- Y,trol of the nveiamp relays 1|', 1|', 12,12' and 13,

andvepairs of stepped cams, 6I Aand 6m, 62. and

. 52a, $3v and 63a, (i4-"and 64a, and 65 and 650i.v

IThese 10 camsare Xed to camshaft 5I in-a stepped r'elation,pas willbe further described.

14), its notch 6I presently underlies the switch support, so that the switch momentarily closes.

Switch 9I is in a circuit to the lamp relay 1I,

which may be traced from transformer 48 (which ,drops the voltage to 6 volts), `through switch 9|, through the signal-sequence changer (which will be later fully described) to lamp relay l'I, and to ground. The energization of relay 'II causes a rrrnovementof the relay armature (to the right as viewed in Fig. 2) to open the circuit to green lamp IIL (at b'-B-b) and to complete the circuit to red lamp 2IL, which may be traced from vrotate cam-shaft 5I upon which are'mounted a y supply line 4), switch 4l, lower contact c', relay contact B, upper` contact c, red lamp ZEL and to ground.V The' closing of switch SI and the energizatio of lampv relay 'II is also instrumental in establishing a holding circuit through the relay. The

cam Sla whichis companion to starting cam 6I and which forms part ci the holding circuit, has aV vrecess IIa, see also Fig. 4,' which is of considerable length compared tothe Vf-notch `6I' of the' starting4 camv 6I.` A'switch @la rests upon the periphery offhclding cam 51a and is normally keptkin; opencondition bythe cam, (asshown),

beingclosed onlyl when the cam. recess Bla underliesit. VSwitch .Slaiis in the holding circuit which may be traced from supply line 40, switch 4l, transformer 48, switch 9Ia, throughthe signal-sequence changer, through a mercoid switch 8I 'in the test cab (which is normally closed),

'through lower contact a-, relay Contact A, upper contact a, relay II .and to ground.

The recess B Ia of holding cam Gla is such that the 'holding circuit remains closed for a pre-determined length of time.'A In one test condition which will be used throughoutv the description of the invention, the holding circuit is kept vclosed forz seconds.' 'Ihat is, the 4red lamp remains `lighted -(and 'the green lamp concurrently remains extinguished). for a full 3 seconds unless,V

the redlight is sooner extinguished by the driver.

K Itis forthis purpose that the mercoid switch 3l. fis ...included in the holding circuit. Mer'coid switch 8I is ,associated Awith larnpsrv I ILand `2IL which are the left turn signal, requiring thev driver :to'turn :the steering wheel, Fig. 1, tothe left; A lever 5 is connected to the steering post by a pair of bevel gears contained in boXj. ydistal end of the lever is' articulated to a plate 'i which is`pivoted at 1a. A left kturn on the-steering wheelcauses a `downward turning of lever 5 and plate 1. The mercoid switch 8| is mounted on plate 'I at such an angle that inthe normal position of the plate (as'sho'wn) mercoid 8| is in circuit-making condition and, when the mounting plate is lowered, is moved to open condition.

`That is, 'the holding circuit to the lamp relay 1I, Fig. 2, remains completed-tokeep the red lamp `2 IL lighted-until the steering wheel is given a left turn to open mercoid 8l todisrupt the holding circuit to the lamp relay.

K lIf the steering wheel is not given a left turn Cams EI, 62,53, 54'and 55 are starting cams while their companionfcams 5m, 62a, 63a, 64a

and,65a are holding cams.` The startingfcams,

e; g1., Cam 6 I, is provided with a V notch 6 I on its periphery, see also Fig. 4.' Cooperative with cam JIlV is a switch SI which rests on the periphery Lof Ythe cam, thusjbeingmaintained in openl conditioniiasshown). Upon therotationpf the cam l(in aclockwise: directiomasjseen' in Figs..2 and 'within 3' seconds, the red lamp will be neverthe- Vless extinguished (andthe green lamp re-lighted) at the end of 3 seconds,'bythe holding cam Gla whose recess Bla remains under the switch Sla for only 3 seconds; thereafter switch QIaopens to disrupt the holding circuit to lamp relay II;

- For the purpose of the present discussion it will I Ahe assumed thatv the signal-sequence changer,

diagrammatically shown in Fig. 2, is not present, but that switches QI andv SlIal are connected ini; circuit with lamp relay II and mercoid 8|;

'that switches 92. and SZaare connected .withlamp The relay 1| and mercoid 8|'; that switches 93. and 93al are connected with lamp relay 12 and'mercoid 82, etc. as shown by the dot-and-,dash lines in Fig. 2. The mercoid 8|', associated with the right turn lamps is mounted, with mercoid 8|, on plate 1, Fig. 1 and is likewise normally in circuit-making condition (as shown) but adapted to be broken when the mounting plate is turned upwardly, which occurs when the' wheel is given a right turn. The mercoid 82, associated with the left foot lamps, is mounted on the left foot lever 2L, and is in circuit-making condition when the lever is in normal, raised position (as shown in Fig. 1).. The mercoid 82', associated with the right foot lamps is mounted on the right foot lever 2R, Fig. 1. The mercoid 83, associated with the hand brake lamps, is mounted on the band brake 3 and is opened when the hand brake is pulled forward.

It is assumed, as above stated, for the purpose of this description, that the signal-sequence changer is not present in the electrical diagram of Fig. 2. That is, the order of operation will be assumed to be first, the left turn signal 2|L under control` of its relay 1|, mercoid 8| and control. cams 6| and Gla; second, the right turn signal 2|R under control of its relay 1|', mercoid 8|' and control cams 62 and 62a, third, the left foot signal 22L under control of its relay 12, mercoid 82 and control cams 63 and 53a, etc. as shown in Fig. 2. It is thus seen that the pair of cams 62 and 62a must be stepped back relatively to cams 6| and6|a so as to come into operation after the latter cams have performed. This stepping is diagrammatically shown in Fig. 2 by the stepped angular positions of the V-notohes of the starting cams 6| to 65 and the recesses of the holding cams 6|a to 65a, see also Fig. 4. The stepping of the pairs of cams is also shown on the schedule of Fig. 5, wherein time in seconds runs rightwardly. Cam 60, the operation of which is represented by the long horizontal top line, closes the holding circuit to the control motor 50 one second after the closing of hand switch 4|. The closing of switch 4| is considered as zero time. At 3 seconds, the starting cam 6| and holding cam Bla came into operation; cam 6| closes its switch 9| for but 1A; second (V-notch 6 while cam 6 la holds its switch 9 la closed for 3 seconds (recess 6|a). After the opening of switch 9| a, there is a lapse of 11/2 seconds before the next pair of cams 62 and 62a (with their switches 92 and 92a) come into operation.

The object of the test is to determine precisely how much time the driver consumes in responding to the various signals. For example, the driver is required to make a left turn immediately upon the lighting of red lamp 2|L. As soon as he has made the left turn (unless, of (course, he fails to do so before the time limit of 3 seconds), the red light is extinguished. That is, the time that red lamp 2 IL remains lighted is a measure of the drivers time of response or reaction to the given signal. Hence the hand 3| of clock 30 turns only during the time that the red lamps remain lighted. As described above, red lamp 2|L remains lighted so long as lamp relay 1| is energized, similarly with red lamp 2 IR and relay 1|', lamp 22L and relay 12, etc. Hence clock relay 'lla is placed in parallel with lamp relay 1| to be energized concurrently therewith, clock relay 1|a' is placed inrparallel with lamp relay 1I, relay 12a with relay 12 etc. The clock relays, like the lamp relays, are normally in unenergized condition with their respective switch contacts d in open condition (as shown in Fig. 2). The clock relays are connected to the clock clutch magnet 34. As heretofore`explained, the clock hand is normally disconnected from the clock motor 32 and is .driven thereby only when clutch magnet 34lis energized. The circuit from clock `relay 1| a to the clutch magnet may be traced from supply line 4D, through re-set switch 20 (which will be subsequentlydescribed), through relay contact d, through the clutch magnet 34 to ground. The hand of the clock being driven only so long as each of the red lamps remain lighted, the hand will register the total test time (in seconds and tenths), that is, the total time the ve red signals remained displayed.

The clock.l motor 32 is supplied with current only during the time the test is underway. It is therefore placed in parallel tothe switch 41. The circuit to the clock motor may betraced from supply line 4), switch 41, motor 32 and to ground.

Itis required to re-set the clock hand to zero at the conclusion ofv each test. For this purpose there is provided a resetting magnet 35 which operates a conventional zeroizing or resetting mechanism (shown diagrammatically in Fig. 2). A resetting cam |56 is securedoncamshaft 5| and has a cooperative switch 36 riding on the peripheryof the cam. Switch 35 is normally open except vvhen notch 66 of the cam cornes under the switch, which drops to close the circuit. Switch 36 is in the resetting circuit whi'chmay be traced from supply line 4Q, switch 36, resetting magnet 35, and to ground. Resetting cam is the last of the stepped cams to come into operation.

It may be desired to re-set the clock manually. For this purpose a hand resetting switch 2|) is provided. In order to prevent the resetting mechanism tocome into operation at a time that the clutch magnet 34 is energized to cause a driving of the c lock hand, ,the manual re-set switch 20 is designed to break the clutch magnet circuit before completing the circuit to re-set magnet 35. For this purpose the re-set switch has two plates E and F. In the normal condition of the switch (as shown in Fig. 2) its plate E makes with xed contacts e and `e in the circuit to the clutch magnet. When it is desired to re-set, switch 20 is pushed upwardly (as viewed in Fig. 2) to break contacts e-E-c and to cause switch plate F to make contact with f and J" which are in the circuit` to resetting magnet 35. f

It is undesirable to conduct the test with the various stimuli signals recurring in a xed order, because the person undergoing .the test will soon be aware of the order or sequence of events and will, consciously or sub-consciously, anticipate their occurrence. Hence the accumulated test time will not be a true accountV of the persons reaction or response. It is for this reason that a signal-sequence changer, Fig. 2, is provided between .the circuits associated with the lamps, the lamp and clock relays and the cab mercoid switches, on theone hand,.and the circuits associated with the stepped Cam controlled switches 9| and Sla to 95 and 95a, on the other hand. The sequence changer is under control of the person conducting the, test who may selectk any desired sequence arrangement (for which the machine may have been designed) by pre-setting ar selector knob 19. Selector knob 19` is secured on a shaft 10. v v

Any number of sequences or order arrangements may be provided. -Six arrangements are shown, Figs. 3 and 6. The person conducting the test may select any arrangement by turning the selector knob preparatory to closing starting switch 4|. The six order arrangements or settings are conveniently designated from I to VI, see Fig. 6. For example, setting I will have the following order or sequence of signals: first, right turn (R. T.), second, right foot (R. F.), third, left foot (L JFJ, fourth, left turn (L. T.), and fifth, hand brake (H. B.) In order that the person conducting the test may know which sequence toselect.(although the particular one selected is of no importance, so long as-the person undergoing the-test does not know what the sequence will be), there are provided indicia I to VI, on dial plate 89.

Also mounted on shaft `1|) with selector knob 19 are five pairs of adjustable contact arms, 14 and 14a, `15 and 15a, 16 and 16a, 11 and 11a, and 18 and 18a, see Fig. 3. By turning selector knob 19, all ten contact arms are turned in unison. As

` shown in Fig. 3, which represents setting I, the

ten contacts make withv the first pair of contacts on their respectivecontact dials, 84 to 88. For example, contact arm 14a makes with a contact leading to a bus wire ||a which leads to cab mercoid switch lil` associated with the right turn (R. T.) signal. Companion contact arm 14 makes with a contact leading to bus wire IUI which leads to lamp relay 1|' and clock relay 1 |a', associated with the right turn (R. T.) signal. The next pair of contact arms, a and 15, lead, respectively, to bus wires |020.' and |02', leading, respectively to cab mercoid 82' and relays 12' and 12a associated with the right foot (R. F.)

signal, etc.' l

A pair of leads |9|- and |9la, see Figs. 3 and 2, lead from cam control switches, respectively, 9|l and 9 la, to the first pair of contact arms, respectively 14 and 14a. A second pair of lleads |92 and|92a lead from cam control switches, respecftively, 92 and 92a, to the second pair of contact arms, respectively, 15 and 15a, etc. It will be clear that electrical current is always supplied to the switches 9| and Sla to 95 and 95a. in the order, from left to right, shown in Fig. 2, and that this `current is always supplied to the leads |9| and |9|a to |95 and |95a., see Fig. 3, in the same order, from left to right, as shown in that gure. That is, electrical current is supplied to the pairs of contact arms Hand 14a to 18 and 18a in the order shown, from left tol right. The order of signal sequence, however, depends upon the particular order selected. For example, in setting I of Fig. 3, the first current impulse received at the rst pair of contact arms 14 and 14a is effective to energize the lamp relay 1| and the clock relay 1|a. This, as already described above, causes the extinguishing vof green signal IIR and the lightl `of the red signal 2|R, associated with the right turn stimuli. A branch circuit (the bus wire IOIa) leads to the mercoid switch 8|', see also Fig. 2, which is opened by making a right turn on the steering wheel, Fig. 1, to extinguish the red light and to stop the turning of the clock hand (relays 1|' and 1|a). The second current is supplied to the second pair of contact arms 15 and 15a which, in settingI (as shown), leads to the relays and mercoid switch associated with the right foot (R. F.) stimuli, etc.

'or stimuli is repeated and the iifth one not used at all.

I claim: v

1. In a device of the class described having a plurality of stimuli signals each comprising an alert lamp and a command lamp, a like plurality of manipulative devices required to be operated in response to the said command lamps, and a clock,'the combination of a camshaft, av control motor, a number of pairs of 'cams equal to the said plurality of stimuli signals and manipulative devices, each pair of cams comprising a starting cam provided with a short recess and a holding cam provided with a long recess, a plurality of switches closed by the said starting and holding cams, the said starting and holding camsv being mounted on the said camshaft in stepped relation whereby the said plurality of cam switches `are sequentially closed, a plurality of signal relays each controlling individual circuits to the alert and command lamps of one pair of stimuli signals, the circuit to the alert'lamp being closed, and the circuit to the command lamp being open, in the de-energized condition of the associated signal relay, the said clock having a motor and a clutch-connected hand, a solenoid for operating the clutch, a plurality of relays each in parallel with one of the said plurality of signal relays and connected to the said clock-hand clutch solenoid, a master holding cam on the said camshaft, a control motor relay, a holding switch in circuit with the control motor relay and normally maintained in open condition by the said master holding cam, a manual starting switch adapted to supply current to the said control motor relay and thereby to the said control motor causing the said master holding cam to close the said holding switch whereby current to the control motor y is suppliedv for a complete revolution, the said manual starting switch and the said holding switch being adapted to supply current to the said lamps and relays and to the said clock motor whereby the said plurality of alert lamps are lighted and the clock motor started, a holding circuit associated with each of the said plurality of signal and clock relays, a plurality of normally closed mercoid switches in the said individual holding circuits adapted to be opened by the said plurality of manipulative devices, a signal-sequence changer having a number of selective arrangements of signal sequences interposed between the said plurality of cam switches and the said plurality of signal and clock relays and merlcoid switches, the starting cam switches being connected in individual circuits with the said signal and clock relays through the' said changer whereby the said relays are energized and their associated command lamps lighted (and the corresponding alert lamps concurrently extinguished) in a sequence depending upon the setting of the said changer, and the said clock solenoid energized to operate the 'clock-hand clutch,

the said holding cam switches being connected in the said individual holding circuits through the said changer whereby the said relays are held energized each for a pre-determined time, to maintain their respective command lamps lighted and the clock clutch solenoid energized for the said pre-determined time, each of the said manipulative devices being adapted to disrupt its associated holding circuit to de-energize the relays thereof and thereby to extinguish its Vassociated command lamp (and to relight the corresponding alert lamp) and to de-clutch the clock hand 'whereby the latter registers the cumulative time the command lamps remain lighted.

2. In a device of the class described having a plurality of stimuli signals each comprising an alert lamp and a command lamp, a like plurality of manipulative devices required to be operated in response to the said command lamps and a clock, the combination of a camshaft, a control motor, a number of cams equal to the said plurality of stimuli signals and manipulative devices, a plurality of switches closed by the said cams, the said cams being mounted on the said camshaft in stepped relation whereby the said plurality of cam switches are sequentially closed, a plurality of signal relays each controlling individual circuits to the alert and command lamps of one pair of stimuli signals, the circuit to the alert lamp being closed, and the circuit to the command lamp being open, in the deenergized condition of the associated signal relay, the said clock having a motor and a clutch-connected hand, a solenoid for operating the clutch, a plurality of relays each in parallel with one of the said plurality of signal relays and connected to the said clock-hand clutch solenoid, a master holding cam on the said camshaft, a control motor relay, a holding switch in circuit with the control motor relay and normally maintained in open condition by the said master holding cam, a manual starting switch adapted to supply current to the said control motor relay and thereby to the said control motor causing the said master holding cam to close the said holding switch whereby the current to the control motor is supplied for a complete revolution, the said manual starting switch and the said holding switch being adapted to supply current to the said lamps and relays and to the said clock motor whereby the said plurality of alert lamps are lighted and the clock motor started, a holding circuit associated with each of the said plurality of signal and clock relays, a plurality of normallyv closed mercoid switches in the saidvindividual holding circuits adapted to be opened by the said pluralityv of manipulative devices, a signal-sequence changer having a number of selective arrangements of signal sequences interposed between the said plurality of cam switches and the said plurality of signal and clock relays and mercoid switches, the said cam switches being connected in individual circuits with the said signal and clock relays through the said changer whereby the said relays are energized and their associated command lamps lighted (and the corresponding alert lamps concurrently extinguished) in a sequence depending upon the setting of the said changer, and the said clock solenoid energized to operate the clock-hand clutch, each of the said manipulative devices being adapted to disrupt its associated holding circuit to de-energize the relays thereof and thereby to extinguish its associated command lamp (and to re-light the corresponding alert lamp) and to de-clutch the clock hand whereby the latter registers the cumulative time the command lamps remainA lighted.

3. In a device of the class described having a plurality of stimuli signals each comprising an alert lamp and a command lamp, a like plurality of manipulative devices required to be operated in response to the said command lamps and a clock, the combination of a camshaft, a control motor, a number of pairs of cams equal to the said plurality of stimuli signals and manipulative devices, each pair of cams comprising a starting cam provided with a short recess and a holding cam provided with a long recess, a plurality of switches closed by the said starting and holding cams, the said starting and holding cams being mounted on the said camshaft in stepped relation whereby the said plurality of cam switches are sequentially closed, a plurality of signal relays each controlling individual circuits to the alert and command lamps of one pair of stimuli signals, the circuit to the alert lamp being closed, and the circuit to the command lamp being open, in the (le-energized condition of the associated signal relay, the said clock having a motor and a clutch-connected hand, a solenoid for operating the clutch, a plurality of relays each in parallel with one of the said plurality of signal relays and connected to the said clock-hand clutch solenoid, a master holding cam on the said camshaft, a control motor relay, a holding switch in circuit with the control motor relay and normally maintained in open condition by the said master holding cam, a manual starting switch adapted to supply current to the said control motor relay and thereby to the said control motor causing, the said master holding cam to close the said holding switch whereby the current to the control motor is supplied for a complete revolution, the said manual starting switch and the said holding switch being adapted to supply current to the said lamps and relays and to the said clock motor whereby the said plurality of alert lamps are lighted and the clock motor started, a holding circuit associated with each of the said plurality of signal and clock relays, a plurality of normally closed mercoid switches in the said individual holding circuits adapted to be opened by the said plurality of manipulative devices, the starting cam switches being connected in individual circuits with the said signal and clock relays whereby the said relays are energized and their associated command lamp sequentially lighted and the corresponding alert lamp concurrently extinguished and the said clock solenoid energized to operate the clock-hand clutch, the said holding cam switches being connected in the said individual holding circuits whereby the said relays are held energized each for a pre-determined time, to maintain their respective command lamps lighted and the clock clutch solenoid energized for the said pre-determined time, each of the said manipulative devices being adapted to disrupt its associated holding circuit to de-energize the relays thereof and thereby to extinguish its associated command lamp (and to relight the corresponding alert lamp) and to de-clutch the clock hand whereby the latter registers the cumulative time the command lamps remain lighted.

4. In a device of the class described having a plurality of stimuli signals each comprising an alert lamp and a command lamp, a like plurality of manipulative devices required to be operated in response to the said command lamps and a clock, the combination of a camshaft, a control motor, a number of pairs of cams equal to the said plurality of stimuli signals and manipulative devices, each pair of cams comprising a starting cam provided with a short recess and a holding cam provided with a long recess, a plurality of switches closed by the said starting and holding cams, the said starting and holding cams being mounted on the said camshaft in stepped relation whereby the said plurality of cam switches are sequentially closed, a plurality of signal relays each controlling individual circuits to the alert and command lamps of one pair of stimuli sig- ,nals, thek circuit to the alert lamp `beingclosed, andthe circuit to the command lamp being open,

inthe deenergized condition of the associated .signalrelay, a plurality of clock controlling relays each in parallel with one of the said plurality of signal relays, a master holding cam on Ythe saidcamshaft, a control motor relay, a holding switch in circuit with the control motor re- 'to vthe control motor is supplied for a complete revolution, the said starting switch and the said holding switch being adapted to supply current lto the said lamps and relays andto the said clock motorwhereby the said plurality of alert lamps are lighted and the clock motor started, a holding v circuitassociated with each of the said plurality of signal and clock relays, a plurality of normally closed mercoid switches in the said individual `holding circuits adapted to be opened by the said `plurality Yof manipulative devices, a `signal-sequence changer having a number of selective ar-l rangements of signal sequencesy interposed between the said plurality of cam switches and the said plurality of signal yand clock relays and mercoid switches, the starting cam switches being connected in individual circuits with the said signal and clock relays through the said changer whereby the said 'relays are energized and their v associated command lamps lighted (and the corresponding alert lamps concurrently extinguished) in a sequence depending upon the setting ofthe said changer, and the said clock opy erated, the said holding camv switches being connected in thev said individual holding circuits through the said changer whereby the said relays are vheld energized each for a pre-determined time, tomaintain their respective command lamps lighted and the clock motor operated for the said pre-determined time, each of the said manipulative devices being adapted to disrupt its associated holding circuit to de-energize the relays thereof and thereby to Vextinguish its associated command lamp (and to re-light the corresponding alert lamp) and to stop the clock whereby the latter registers the cumulative time the command lamps remain lighted. y

5. In a device of the class described having -a plurality of-gstim-uli signals each lcomprising an alert lamp and a command lamp, a like plurality ofV manipula-tive devices required to be operated ,iny response to the said command lamps land a clock, the combination of a camshaft, a control motor adapted to impart a complete revolution thereto, a number of pai-rs -of -ca-ms equal to the said plurality of stimuli signals and manipulative devices, each pair vof vcams comprising a starting cam provided with a short recess and ay holding cam provided with a long recess, a plurality of switches closed by the said starting and holding cams, the said starting and holding cams being mounted on the said camshaft ,in stepped relation whereby -the said plurality of cam switches are sequentially closed, a plurality 'of signal relays each controlling individual circuits to the alert and command lamps -of Aone pair of sti-muli v signals, the circuit to the alert lamp fbeing closed, and the circuit to the command lamp being open, in the un-energized condition yof the associated signal relay, the said clock having fa rmotor and a clutch-connected hand,1a solenoid for operating the clutch, a plurality of relays'each in parallel with one of the said plurality of signal relays and connected to the said clock-hand clutch solenoid, a manual starting switch adapted to supply vcurrent to the said lamps and relays and to the said control and clock motors whereby the said plurality of alert lamps are lighted and the clockmotor started, a holding circuit associated with each vof the said plurality of signal and clock relays, a plurality of normally closed mercoid switches in the said individual holding circuits adapted to be opened by the said plurality of manipulative devices, a signal-sequence changer having a number of selective arrangements of signal sequences interposed between the said plurality of cam switches and the said plurality of signal and clock relays and mercoid switches, the starting cam switches being connected in individual circuits with the said signal and clock relays through the said changer whereby the said relays are energized and their associated comm-and lamps lighted (and the corresponding alert lamps concurrently eiotinguislied)r in a sequence depending upon the setting of the said-changer and the said clock solenoid energized to operate the clock-hand clutch, the 'said holding cam switches being Connected in the `said individual holding circuits through the said changer whereby the said relays are held energized each for a pre-determined time, to maintain their respective command lamps lighted and the clock clutch solenoid .energized for the said pre-determined time, each of the said manipulative devices being adapted to disrupt its `associated holding circuit to de-energize `the relays ,thereof and thereby to extinguish its associated command lamp (and to re-light the corresponding alert lamp) and to cle-clutch the clock hand whereby the latter registers the cumulative time the command lamps rem-ain lighted.

6. In a device of the class described having a plurality of stimuli signals each comprising an alert lamp and a command lamp, a like plurality of manipulative .devices required vto be operated in response to the said command lamps, and la clock, theA combination of a camshaft, a control motor designed to impart a complete revolution thereto, a number of -cams equal to the said plurality kof stimuli signals and manipulative devices, a plurality of switches closed by the said cams, the said cams being mounted on the said camshaft in stepped relation whereby the said .plurality of .cam switches are sequentially closed, a plurality .of sig-nal relays each controlling individual circuits to the alert and command lamps .of .one pair of stimuli signals,

the circuit to .the alertlamp being closed, and the circuit to the command lam-p ,being open, in the de-e-nergized condition of the associated signal relay, a'plurality of clock controlling relays each in parallel with one of the said Aplurality of signal relays, a manual starting switch adapted to supply current to the said lamps and -relays and to vthesaid control and clock motors whereby the said plurality of alert lamps are -l-ighted Vand the clock motorstarted, a ,holding circuit associated with each of the said plurality of signal and clock relays, la plu-rality vof normally closed mercoid switches in .the Asaid individual holding circuits adapted .to be opened by thesaid plurality rof v`manipulative devices, a signal-sequence changer having a number of selective arrangemen-ts of signal sequences interposed between the said plurality of cam switches and the said plurality of signal and clock relays and mercoid switches, the said cam switchesv being connected inl individual circuits with the said signal and clock relays through the said changer whereby the said relays are energized and their associated command lamp lighted (and the corresponding alert lamp concurrently extinguished) in a sequence depending upon the'setting of the said changer, and the ,said clock operated for a pre-determined time, each of the said manipulative devices being adapted to disrupt its associated holding circuit to de-energize the relays thereof and thereby to extinguish its associated command lamp (and to re-light the corresponding alert lamp) and to stop the clock whereby the latter registers the cumulative time the command lamps remained lighted.

'7. In a device of the classdescribed having a plurality of stimuli signals each comprising an alert lamp anda command lamp, a like plurality of manipulative devices required to be operated in response to the said command lamps, and a clock, the combination of a camshaft, a control motor, a number of cams equal to the said plurality of stimuli signals and manipulative devices, la` plurality of switches closed by the said cams', the said cams being mounted on the said camshaft in stepped relation whereby the said plurality of ycam switches are'sequentially closed, a plurality of signal relays each controlling individual circuits to the alert and command lamps rality of clock controlling relays each in parallel with one of the said plurality'of signal relays, a holding cam mounted Von the said camshaft, a control motor relay, a holding switch in circuit with the control motor relayv normally maintained in open condition by the said holding cam, a manual starting switch adapted to supply current to the said control motor relay and thereby to the said control motor causing the said holding cam to close the said holding switch whereby current to the control motor is supplied for a complete revolution, the said manual starting switch andthe said holding switch being adapted to supply current to the said lamps and relays and to the said clock motor whereby the said plurality of alert lamps are lighted and the clock motor started, a holding circuit associated with each of the said plurality of signal and clock relays, a plurality of normally closed mercoid switches in the said individual `holding circuits adapted to be opened by the said plurality of manipulative devices, a signal-sequence changer having a number of selective arrangements of signal-'sequences interposed between the said plurality of cam switches and the said plurality of signal and clock relays and mercoid switches, the said cam switches being connected in individual circuits with the said signal and clock relays through the said changer whereby the said relays are energized and their associated command lamps lighted (and the corresponding alert lamps concurrently extinguished) in a sequence depending upon the setting of the said changer, and the said clock operated for a pre-determined time, each of the said manipulative devices being adapted to disrupt its associated holding circuit to de-energize the relays thereof and thereby to extinguish its associated command lamp (and to relight the corresponding alertv lamp) and to stop theV clock whereby the latter registers the cumulative time the command vlamps remain lighted.

8'. In a device of the class described having a plurality of stimuli signals each comprising an alert lamp and a command lamp, a like plurality of manipulative devices required to be operated in response to the said command lamps, and a clock, the combination of a camshaft, a control motor designed to impart a complete revolution thereto, a number of cams equal to the said plurality of stimuli signals and manipulative devices, a pluralityof switches closed by the said cams, the said cams being mounted on the said camshaft in stepped relation whereby the said plurality of cam switches are sequentially closed, a pluralityof signal relays each controlling 'individualcircuits to the alert and command lamps of one pair of stimuli signals, the circuit to the alert lamp being closed, and the circuit to the command lamp being open, in the de-energized condition of the associated signal relay, the said clock having a motorv and a clutch-connected hand,'a solenoid for operating the clutch,r a plurality of relays each in parallel with one of the said-,plurality of signal relays and connected .to the said clock-hand clutch solenoid, a manual starting switch adapted to supply current to the said lamps and relays and thereby to the said control and clock motor .whereby the said plurality of alert lamps are lighted and the clock motor started, a holding circuit associated with each of the said plurality of signal and clock relays, a plurality of normally closed mercoidswitches in the said individual holding circuits adapted to be opened by the said plurality of manipulative devices, a signal-sequence changer having a number of selective arrangements of signal sequences interposed between the said plurality of cam switches and the said plurality of signal and clock relays and mercoidswitches, the said cam switches being connected in individual circuits with the said signal and clock relays through the said changer whereby the said relays are energized and their associated command lamps lighted (and the corresponding alert lamps concurrently extinguished) in a sequence depending upon the setting of the said changer, and the said clock solenoid energized to operate the clock-hand clutch, for a predetermined time, each ofthe said manipulative devices being adapted to disrupt its associated holding circuit to de-energize the relays thereof and thereby to extinguish its associated command lamp (and to re-light the corresponding alert lamp) and to de-clutch the clock hand whereby the latter registers. the cumulative time the command lamps remain lighted.

9. In a device of the class described having a plurality of stimuli signals each comprising an alert lamp and a command lamp, a like plurality of manipulative devices required to be operated in response to the said command lamps, and a clock, the combination of a camshaft, a control motordesigned to impart a complete revolution' thereto, a number of cams equal to the said plurality of stimuli signals and manipulative devices,l a plurality of switches closed by the said cams, the said cams being mounted on the said camshaft in stepped relation whereby the said plurality of cam switches are sequentially closed, a plurality of signal relays each controlling individual circuits to the alert and command lamps of one pair of stimuli signals, the circuit to the f alert lamp being closed, and the circuit to the.

command lamp beingopen, inA the de-energized condition of the associated signal relay, a plurality'of clock controlling relays each in parallel with one of the said plurality of signal relays, a manual starting switch adapted to supply current to the said lamps and relays and to the said control and clock motor whereby the said plurality of alert lamps are lighted and the clock motor started, a holding circuit associatedvwitheach of'the'said plurality oflsignal and clock relays, a plurality' of normally closed mercoid switches in the said individual holding circuits adapted to be openedby the saidplurality of manipulative devices, a signal-sequence changer having a number of selective arrangements of signal sequences interposed. between the said plurality ofV cam switches and the said pluralityv ,of signal. and clock relays and mercoid switches, the said cam switches being connected in'indivvidual circuits with the said signal and clock relays through the said changer wherebyV the said relays'.v are energized and their associated 'command lamps lighted (and the corresponding alert lamps concurrently extinguished) in a sequence vdepending upon the settingfof the said changer,

and the said clock operatedior a predetermined time, each of the saidmanipulative devices being adapted to disrupt its associated holding circuit to de-energize the relays thereof and thereby tol anda clock, the combination of a camshaft, a`

control motor designed to impart a complete revolution thereto, a number of cams equal to the said plurality of switches closed by the said cams, the said cams being mounted on the said camshaft in stepped relation whereby the said plurality of cam switches are sequentially closed, a plurality of signal relays each controlling in-v dividual circuitsy to the alert and command lamps of one. pair of stimuli signals, the circuit to 'thealert lamp being closed, and the circuit to the command lamp being open, in the deenergized condition of the associated signalrelay, ayplurality of clock controlling relays each in parallel with one-of the said plurality of signal relays, a manual starting switch adapted to supply current to the said lamps and relays and thereby Yto thelsaid control and clock motor Wherebyfthe said plurality of alert lamps are lighted and the yclock motor started, a holding circuit associated with` each of the said plurality .of signal .and clock relays, a plurality of normally closed mercoid switches in the said individual holding circuits adapted to be opened bythe said' plurality of manipulative devices, the said cam switches being connected in individual circuitsy with the said'signal and clock relays wherebythe said relays are energized and theiry associated command lamps sequentially liglitediand the corresponding alert lamps concurrently extinguished), and the said clock operated fora pre-determined time, each of the said manipulative devices being adapted to disrupt itslassociated holding circuit to de-eriergizcthe relays thereofand thereby to extinguish its-asso ciated command lamp (and'to relight the cor-` responding alert lamp)r and to stopfthe clockL time whereby the latter registers the cumulative the command lamps' remain lighted.

' 1.1.' Ina' device of the class described having la' plurality ofpairs of .stimuli signals each pair comprising 'an alert'lamp and a co'mmand'lamp,l a like plurality,ofl'manipulative devices required to be operated in respcnse to the said command g lamps,'and1a. clock, the combination of acamshaft, a motrides'ignedf to impart a complete revolution thereto, va-numloer vof pairs of `cams equal to the said plurality of stimuli signalsa'nd manipulative devices, mounted in stepped relationy on the camshaft,each pair of stepped cams q comprising astarting cam provided with a short recess and a holdingv camf'provided with a long recess a plurality of vswitches closed by the said `rstarting and holdingcan'fls,L a plurality'of signal relays each controlling individual circuits to the' alert and command lamps of one pair of stimuli signals, the circuit to the alert lamp being closed,

and the circuit to ther command lamp being open,

in' the de-energ'ized condition of the associatedv signal relay, a plurality of clock controlling relays each in parallel.v with one of the said 'plural-v ity of signal relays, the said :starting cam switches being inindivi'dual circuits with the said signal and clock relays whereby the said relays are,

ing circuits whereby the-said relays are sequentially held energized each for a pre-determined*vv time, to maintain .theirv respective command lamps lighted and to-operate the clock for the period of relay energization, a plurality ofnormally closedymercoid switches opened by the said plurality of manipulative devices, in the said individual holding circuits whereby operation of a manipulative device disrupts its associated holding circuit to un-energize the relay thereof and to extinguish itsvassooiated commandllamp and to lre:1ight the corresponding alert lamp and to'stop the operationof the clock.

12.` In a device of the class described having a plurality of Ipairs of stimuli signals each 'pair comprising an alert lamp and a command lamp, a like plurality of manipulative devices required to be operatedin response to the said command lamps, and a clock, the combination of a camshaft, ya motor designed to impart a complete` revolution thereto, a number of cams equal to the said plurality of stimuli signals and manipulative devices, mounted in'stepped relationonthe camshaft,` a pluralityy of switches closed by the said cams, aplurality of signal relays each controlling individuall circuits to the alert and command lamps of one pair ofy stimuli signals,

the circuit to the alert lamp being closed, and e the circuit to the command lamp being open, in the cle-energized condition lof the associated signal relay, a pluralityof clock controlling. relays each in parallel with one of the said plurality of signal relays, 'the saidv cam switches being in individual circuits with the said signal and clock relayswhereby the said relays are sequentiallyl energized and their associated command lamp sequentially lighted and the corresponding alert lamp concurrently extinguished and the said clock sequentially operated for a pre-determined time, a holding circuit associated with each of the said plurality of signal and clock relays, a plurality of normally closed mercoid switches in the said individual holding circuits opened by the said plurality of manipulative devices, whereby operation of a manipulative device disrupts its associated holding circuit to de-energize the relay thereof vand to extinguish its associated command lamp and to re-light the corresponding alert lamp and to stop the operation of the clock.

13. In a device of the class described having a plurality of pairs of stimuli signals each pair comprising an alert lamp and a command lamp, a like plurality of manipulative devices required to be operated in response to the said command lamps, and a clock, the combination of a camshaft, a motor designed to impartv a complete revolution thereto, al number of cams equal to the said plurality of stimuli signals and manipulative devices, a plurality of switches closed by the said cams, the said cams being mounted on the said camshaft in'stepped relation whereby the said plurality of cam shafts are sequentially closed, a plurality of signal relays each controlling individual circuits to the alert and command lamps of one pair of stimuli signals, the circuit to the alert lamp being closed, and the circuit tothe command lamp being open, in the deenergized condition of the associated signal relay, a plurality of clock controlling relays each in parallel with one of the said plurality of signal relays, a plurality of normally closed mercoid switches in the said relay circuits adapted to be opened by the said plurality of manipulative devices, a signal-sequence changer having a number of selective arrangements of signal sequences comprising a plurality of gang switches equal to the said plurality of stimuli signals, relays, cam and cam switches, the said gang switches each having an adjustable contact and a number of selective positions equal to the said number of selective arrangements,- a knob for moving the gang switches in unison to a preselected position, the said cam switches being sequentially connected to the adjustable contacts of the plurality of selective switches, and the said signal and clock relays and ther said mercoid switches being connected in diierent sequences to each of the plural positions of the said selective switches, whereby adjustment of the knob to different positions provides diierent signal-sequences, the said cam switches being connected in individual circuits with the said signal and clock relays through the said changer whereby the 'said relays are energized and their associated command lamps lighted (and the corresponding 'alert lamps concurrently extinguished)y in a sequence depending upon the setting of the said changer knob, and the said clock motion operated for a pre-determined time, each of the said manipulative devices being adapted to disrupt its associated holding circuit lto de-energizev the relays thereof and thereby to extinguish its associated command lamp (and to relight the corresponding alert lamp) and to stop the clock whereby the latter registers the cumulative time the command lamps remain lighted.

14, In a device of the class described having a plurality of stimulisignals eachcomprising` an alert lamp and a command lamp, a like plurality of manipulative devices required to be operated in response to the said command lamps and a clock, the combination of a camshaft, a

control motor designed to impart a complete revolution thereto, a number of pairs of cams equal to the said plurality of stimuli signals and manipulative devices, each pair of cams lcomprising a starting cam provided witha short recess and a holding cam provided with a long recess, a plurality of switchesl closed by the said starting and holding cams, the said starting and holding cams being mounted on the said camshaft in stepped relation whereby 'the said plurality of cam switches are sequentially closed, a plurality of signal relays each rcontrolling individual circuits to the alert and'command lamps of one pair oi stimuli signals, the circuit to the alert lamp being closed, and the circuit to the command lamp being open, in the de-energized ycondition of the vassociated signal relay, a plurality of clock controlling relays each in parallel with one of ther said plurality of signal relays, a plurality of normally closed mercoid switches in the said relay circuits adapted to be opened by the said plurality of manipulative devices, a signal-sequence changer having a number of selective arrangements of signal sequences comprising a plurality of gang switches equal to the said plurality of stimuli signals, relays, cam and pairs of cam switches, the' said gang switches each having a double adjustable contact and a number of lpairs of selective 'positions' equal to the said number of selective arrangements, a knob for moving the gang switches in unison to a pre-selected position, the said starting cam and holding cam switches being sequentially connected to the double adjustable contacts ofA the pluralityof selective switches, 'and the said signal and clock relays and the said mercoid` switches being connected in different sequence to each of the pairs ofplural positions of the said selective switches, whereby adjustment of the knob to differentv positions provides different signal-sequences, the'starting cam switches being connected `in individual circuits with the said signal and clock relays through the said changer whereby the said relays are energized and their associated command lamps lighted (and the corresponding alert lamps concurrently extinguished) in a sequence depending upon `the setting of the said changer knob, and the said clock solenoid energized to operate the clock hand clutch, the said holding cam switches being connected in the said individual holding circuits through the said changer whereby the said relays are held energized each for a pre-determined time, to maintain their respective command lamps lighted and the clock clutch solenoid energized for the said pre-determined time, each of the said manipulative devices being adapted to disrupt its associated holding circuit to deenergize the relays thereof and thereby to extinguish its associated command lamp (and to re-light the corresponding alert lamp) and to de-clutch the clock hand whereby the latter registers the cumulative time the command lamps remain lighted..

15. In a device of the class described having a plurality of stimuli signals each comprising an alert lamp and a command lamp, a like plurality of manipulative devices required to be operated in response to the said command lamps and a clock, the combination of a camshaft, a control motor designed to impart a complete revolution thereto, a number of cams equal to the said plurality of stimuli signals and manipulative devices mounted on the said camshaft in a-stepped relation, a plurality of switches `,closed by the said cams, a plurality of signal relays each controlling individual circuits to the alert and command lamps of one pair of stimuli signals, the circuit to the alert lamp being closed,r and the circuit to the command lamp being open, in the de-energized condition of the associated signal relay, the said clock having a motor and a clutch-connected hand, a solenoid for operating the clutch, a plurality of relays each in parallel with one of the said plurality of signal relays and connected to the said clock-hand clutch solenoid, a master holding cam on the said camshaft, a holding switch to the said control motor normally maintained in open condition by the said master holding cam, a manual starting switch adapted .to supply current to the said motor .causing the'said master holding cam to close the said holding switch whereby current is supplied to the control motor for a complete revolution, the said clock motor being connected across the said lholding switch whereby the clock motor is operated during the time the switch is closed, a holding circuit associated with each of the said plurality of signal and clock relays, a plurality of normally closed mercoid switches in the said individual holding circuits, adapted to be opened by the said plurality of manipulative devices, the said plurality of cam switches being in the said individual circuits whereby thesaid clock-hand solenoid 'is energized for a predetermined time, each of the said manipulative devices being adapted to disrupt its associated holding circuit to de-energize the said clock relay and to rde-clutch the clock hand whereby the latter registers the cumulative time the command 'lamps remain lighted, a clock resetting means, a solenoid to operate the same, and a manual resetting switch including a normally closed contact in the said clock-hand clutch solenoid and clock relay circuit and a normally opened contact in the said resetting solenoid circuit, whereby the two said circuits are never concurrently closed.

16. The combination according to claim further provided with a cam mounted on the said camshaft,Y a switch controlled by the said cam provided in circuit with the clock'resetting solenoid, whereby the clock hand is reset at the.'

conclusion of the camshaft revolution.

17. In a device of the class described having a plurality of stimuli signals, a like plurality of manipulative devices required to be operated in lresponse to the said signals, and a clock, the combination of a camshaft, a motor designed to impart acomplete revolution thereto, a number of pairs of cams equal to the said plurality of stimuli signals and manipulative devices, mounted in stepped relation on `the said camshaft, each pair of stepped cams comprising a starting cam provided with a short recess and a holding cam provided with a long recess, a plurality of switches closed by the said starting and holding cams, a plurality of signal relays each controlling an individual circuit to one of the said stimuli signals, the said signal circuits being closed upon the energization of their respective relay, the said starting vcam. switches being in individual circuits with the said signal relays whereby the said relays are sequentially energized and their asf sociated signals sequentially lighted, a holding circuit associated with each of the said plurality of signal relays, the said holding cam switches being in the said individual holding circuits whereby the said relays are sequentially held energized each for a pre-determined time, to

5 ation of a manipulative device disrupts its associated holding circuit to de-energize the relay thereof and to extinguish its associated stimuli signal.

18. In a device of the class described having a 10 plurality of stimuli signals, a plurality of manipulative devices required to be operated in response to the saidsignals, and a clock, the combination of a camshaft, a motor designed to impart a complete revolution thereto, a number of cams equal l5 to the said plurality of stimuli signals and manipulative devices mounted in stepped relation on the said camshaft, a plurality of switches controlled by the said cams, a plurality of signal relays individually associated with the said pluralityy of stimuli signals, a plurality of mercoid switches individually associated with the said plurality of manipulative devices, the said cam switches being in individual circuits with the said signal relays whereby the said relays are sequentially en- .25 ergized for a pre-determined period, a holding circuit associated with each of the said plurality of signal relays, the said plurality of mercoid switches being in the said individual holding circuits whereby operation of the associated manip- 30. ulative device disrupts its associated holding circuit to cie-energize its relay and to extinguish its associated stimuli signal.

19. In a device of the class described having a plurality of stimuli signals,- a like plurality of manipulative devices required to be operated in responseto the said signals, and a clock, the combination of a camshaft, a motor designed to impart a complete revolution thereto, a number of cams equal to the said. plurality of stimuli signals andmanipulative devices mounted in stepped relation on the said camshaft, a plurality of switches closed by the said cams, a plurality of relays each controlling an individual circuit to one of .the said stimuli signals, the said signal circuits being closed uponv the energization of their respective relays', a plurality of signal relays each in parallel with one of the said plurality of signal relays, lcontrolling the said clock, the said cam switches being in individual circuits with the said signal relays and the said clock relays whereby the said relays areA sequentially energized and their associated signals sequentially lighted and the said clock sequentially operated for a pre'- determined period, a holding circuit associated with each of the said plurality of signal and clock relays, a plurality of normally closed mercoid switches in the said individual holding circuits opened by ythe said plurality of manipulative de- `vices whereby operation of a manipulative device disrupts its associated holding circuit to de-energize the relay thereof and to extinguish its associated stimuli signal and to stop the operation of ythe clock.

20. In a device of the class described rhaving a plurality of stimuli signals, a like plurality lof manipulative devices required to be operated in response to the said signals, and a clock, the combination of a camshaft, a motor ydesigned to impart a complete revolution thereto, a number of cams equal to the said plurality of stimuli signals and manipulative devices, a plurality of switches 'closed by the said cams, the said cams being mounted on the `said camshaft in stepped relation whereby the said plurality of cam switches are sequentially closed, a plurality of signal relays each controlling an individual circuit to one of the said stimuli signals, the Said' signal circuits being closed upon the energization of their respective relay, a holding circuit associated with each of the said plurality of signal relays, a plurality of normally closed mercoid switches in the said individual holding circuits opened by the said plurality of manipulative devices, a signal-Sequence changer having a number of selective arrangements of signal sequences interposed between the said plurality of cam switches and the said plurality of signal relays and mercoid switches, .the cam switches being connected in individual circuits with the said relay signals through the said changer whereby the said relays are energized and their associated signals lighted in a sequence depending upon the setting of the said changer for a pre-determined time, the said manipulative devices being adapted to 'disrupt its associated holding circuit to deenergize the relay thereof and to extinguish its l0 associated stimuli signal.

SAMUEL P. BROWN. 

